Knowing when to use less and fewer is often something people find difficult which of these sentence is wrong

Hey, i need on these. i need to rewrite the sentences in the activity by replacing the bolded direct/indirect objects with the correct direct/indirect object pronouns. there are five of them.

Stell eine frage: 1. ich hole sie vom bahnhof ab. 2. ich komme nach der schule. 3. in die disko. 4. fahren sie in die 3. etage. 5. im bioladen. 6. wir treffen dort viele leute. 7. im erdgeschoss. 8. ins kaufhaus.

When you use construct a sentence in german in past tense for example i drank milk on monday in the caravan the last tense version ich getrinken milsch am montag in mine whonwagen how would you put this is the write order if the sentence